ATS 601-940-4416 A50 TO T87 TRANSMISSION CONTROL MODULE UPGRADE (TCM) FOR 15 GM 2500HD/3500HD WITH 6.6L DURAMAX

ATS TCM Upgrade, A40 / A50 to T87A. Fitment: 2011- Early 2015 GM 6.6L Duramax. The A40 and A50 TCM that is used to control the Allison 6-speed automatic transmission is the weak link of the Allison transmission.

This is due to delicate thin wires inside the TCM that contact one another overtime and short-out the entire module. In 2022, Allison sent out a letter (SIL 15-1K2K-22) announcing the discontinuation of support for the A50 and A40.

This effectively left over 10,000 Duramax owners out of their trucks. So we got to work developing a solution utilizing our Translator technology found in the ATS Allison Conversion to help get these trucks back on the road, shifting and holding power even better than before, ASAP!

The A50 and A40 TCM have been used in all GM Duramax/Allison Diesel Trucks produced from 2006 to 2017. ATS is excited to release the new GM Allison T87A upgraded TCM module. The upgraded TCM comes in an assembly including our Translator module that also has our Co-Pilot transmission functions built in.

Features:

• Works with stock or modified trucks.
• Controls and increases line pressure.
• Direct replacement, no permanent modifications required - plug and play OEM quality harness and module.
• Found on the current 2023 Duramax, the T87a TCM has a much faster processor than the A50 and that equates to better shift quality, faster shifting and overall improved drivability.
• Direct Replacement for AC Delco: TCM 24256861 25978353 15117030

Includes:

• New T87a TCM that is unlocked and has a custom ATS calibration pre-installed that optimizes the performance of the Allison transmission.
• New Translator module that has the Co-Pilot transmission pressure function enhancements built in. The Co-Pilot functionality allows the factory Allison transmission to handle higher power levels and much better durability.
• Mounting Bracket
• Wiring Harness

The ATS 601-940-4416 A50 to T87 Transmission Control Module Upgrade (TCM) for the 2015 GM Duramax 6.6L LML is the solution you need for enhancing the performance and reliability of your GM Duramax/Allison Diesel Trucks produced from 2009 to 2017.

The A50 and T14 TCMs that have been traditionally used to control the Allison 6-speed automatic transmission are known to be the weak link due to delicate wiring that can short-out over time. With Allison discontinuing support for these TCMs, over 10,000 Duramax owners were left without a solution. The ATS T87 Upgrade replaces the outdated TCMs with an advanced assembly including the Translator® module, providing a significant boost in power, performance, and reliability.

This upgraded TCM introduces our Translator® technology, enhancing the functionality of the factory transmission by increasing power holding capability and enabling smoother shifting even under high power levels. With the Co-Pilot transmission functions built in, the T87 Upgrade not only prevents clutch pack damage in the Allison transmission but also offers a more aggressive factory exhaust brake over the original TCMs.

This plug-and-play upgrade does not require any permanent modifications and comes with all new components, eliminating the need for a core charge. It works seamlessly with stock or modified trucks, improves throttle response, increases fuel economy, and provides updated shift points for optimized engine performance. The improved torque converter lock-up response and enhanced shift quality make for a more enjoyable driving experience.

Included in the package is a new T87 TCM with custom ATS calibration, a Translator® module, digital speed and turbine sensors, mounting bracket, and wiring harness. With this upgrade, you can expect increased transmission life expectancy, better MPG, and a safer driving experience, making it a must-have for any GM 6.6L Duramax owner looking to enhance their vehicle's performance.